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What will happen if you forget to call db.session.commit() after adding objects in a Flask test?

medium📝 component behavior Q5 of 15
Flask - Testing Flask Applications
What will happen if you forget to call db.session.commit() after adding objects in a Flask test?
AThe test will raise a syntax error
BObjects will be saved automatically
CObjects won't be saved to the database
DThe database will be deleted
Step-by-Step Solution
Solution:

  1. Step 1: Understand session commit role

    db.session.commit() saves changes to the database permanently.

  2. Step 2: Consequence of missing commit

    Without commit, added objects remain in session only and are not saved.

  3. Final Answer:

    Objects won't be saved to the database -> Option C

  4. Quick Check:

    Missing commit = no save [OK]
Quick Trick: Always commit session to save changes [OK]
Common Mistakes:
MISTAKES
  • Assuming auto-save
  • Expecting syntax errors
  • Thinking DB deletes on no commit

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